Top 1000+ Solved Microbiology MCQ Questions Answer
Q. Isolation is
a. Purification of culture
b. Introduction of inoculum
c. Separation of a single colony
d. To grow microorganisms on surfaces
Q. The condition required for autoclave
a. 121oC temp.and 15 lbs. pressure for 20 min.
b. 120oC temp.and 20 lbs. pressure for 30 min
c. 150oC temp.for 1 hr.
d. 130oC temp for 2 hr.
Q. Lysozyme is effective against
a. Gram negative bacteria
b. Gram positive bacteria
c. Protozoa
d. Helminthes
Q. Blood agar medium is
a. Enrichment medium
b. Enriched medium
c. Selective medium
d. Differential medium
Q. Infrared radiation is a method of sterilization by
a. Dry heat
b. Moist heat
c. Chemical method
d. Mechanical method
Q. Lyophilization means
a. Sterilization
b. Freeze-drying
c. Burning to ashes
d. Exposure to formation
Q. Temperature used for hot air oven is
a. 100oC for 1 hour
b. 120oC for 1 hour
c. 160oC for 1 hour
d. 60oC for 1 hour
Q. Phenol co-efficient indicates
a. Efficiency of a disinfectant
b. Dilution of a disinfectant
c. Purity of a disinfectant
d. Quantity of a disinfectant
Q. This is an agar plate method and is commonly used for estimation of the number of bacteria in milk.
a. Standard Plate Count (SPC)
b. Spread plate
c. Lawn culture
d. Roll tube method
Q. A gram positive organism which producesswarming on culture medium is
a. Salmonella
b. Clostridium
c. Staphylococci
d. Proteus
Q. Enhancement of virulence in bacteria is known as
a. Pathogenicity
b. Attenuation
c. Exaltation
d. Toxigenicity
Q. For effective sterilization in an autoclavethe temperature obtained is
a. 50oC
b. 100oC
c. 120oC
d. 180oC